Surface potential generated by pulsed laser interaction with materials

Dissertant

al-Sabbagh, Raghad Badr Dawud

University

University of Technology

Faculty

-

Department

Applied Sciences Department

University Country

Iraq

Degree

Master

Degree Date

1999

English Abstract

The generated potential on tie target surface Is one of the effects produced by high Intensity laser Interaction with the target, which could be implemented for laser detection St position of focus point.

Materials with differently prepared such as bulk, compact powder, thin film, composite m ate rails, and alloys were investigated.

The compact powder produces higher voltage (300mv), never the less the composite materials provide the highest voltage value (400mv).

Three external methods were used for signal amplification fake die surface heating, applying electric field, and gas pumping over the target surface.

Also a new technique is presented for the first time for the amplification of the signal It depends on connecting external probe with the target by special method, which increases the generated potential on lead surface by (4558,8 %).

The results of this study indicate that this phenomenon can be used as laser power meter, which has high response compared with the thermal detectors and it is equivalent to the more expensive photo detectors, in addition it could be used with high intensity laser beam.

The temporal characteristic studies of the generated potential reveal that this signal originated from plasma.

This agrees with plasma e Metrical studies, which were previously carried out.

Main Subjects

Physics

Topics

• Salts
• Lasers

• APA
• MLA
• AMA

Language

English

Data Type

Arab Theses

Record ID

BIM-306338